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Reusable electrophotographic recording medium and method for producing the same, image forming method, and method for repeatedly using electrophotographic recording medium

a recording medium and electrophotography technology, applied in the field of reusable electrophotographic recording media, to achieve the effect of less environmental load, less environmental load, and effective reus

Inactive Publication Date: 2006-03-23
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0023] The objects of the present invention are, in the first aspect, to provide electrophotographic recording media, in which the recording media can be utilized to form images by conventional electrophotographic systems, the image fixing property is within practical range, image falling and / or smear are not likely to occur due to offset, images are high quality, image forming materials can be easily removed from the recording media on which images are formed, image quality and image erasing property undergo less change under repeated usages, and the cost is lower; and also to provide methods for producing the electrophotographic recording media, image forming methods by use of the recording media, and method for repeatedly using the recording media.
[0024] The objects of the present invention are, in the second aspect, to provide reusable electrophotographic recording media and methods for producing the same, in which the recording media can be coated by use of an aqueous solvent and a conventional coating device without employing such solvents as organic solvents and fluorocarbons, the recording media can be produced by way of safety processes with less environmental problems, and the surface layer of the recording media is water resistant after the coating liquid is dried.
[0025] The objects of the present invention are, in the third aspect, to provide reusable electrophotographic recording media, methods for producing the same, image forming methods by use of the recording media, and method for repeatedly using the recording media, in which image forming materials can be removed without applying image erasing promoters that contain organic solvents and / or surfactants by use of a simple image erasing unit, thus images can be erased with less environmental problems and lower running cost.

Problems solved by technology

In addition to the configuration of supports, portions of repellent or affinitive for image forming materials derived from uneven quality of materials may refuse the olefin-maleic anhydride copolymer to be coated into a layer.

Method used

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  • Reusable electrophotographic recording medium and method for producing the same, image forming method, and method for repeatedly using electrophotographic recording medium
  • Reusable electrophotographic recording medium and method for producing the same, image forming method, and method for repeatedly using electrophotographic recording medium
  • Reusable electrophotographic recording medium and method for producing the same, image forming method, and method for repeatedly using electrophotographic recording medium

Examples

Experimental program
Comparison scheme
Effect test

synthesis example 1

—Synthesis of Olefin-Maleic Anhydride Copolymer—

[0205] A mixture of liner a-olefin compounds having a carbon number of 12 to 14 and maleic anhydride were poured into an autoclave in a mole ratio of 1 / 1, and the atmosphere within the autoclave was replaced with nitrogen gas, then the mixed compounds were allowed to react at 200° C. for 5 hours. The mixture of liner α-olefin compounds was comprised of an olefin compound having a carbon number of 12, an olefin compound having a carbon number of 13, and an olefin compound having a carbon number of 14 in a mole ratio of 4 / 3 / 3.

[0206] The resultant reaction product was saponified in an ammonium hydroxide aqueous solution, thereby an aqueous solution of a polymer was obtained. The solid content of the polymer was 20% by mass in the aqueous solution.

synthesis example 2

—Synthesis of Olefin-Maleic Anhydride Copolymer—

[0207] A mixture of liner a-olefin compounds having a carbon number of 16 to 18 and maleic anhydride were poured into an autoclave in a mole ratio of 1 / 1, and the atmosphere within the autoclave was replaced with nitrogen gas, then the mixed compounds were allowed to react at 200° C. for 5 hours. The mixture of liner α-olefin compounds was comprised of an olefin compound having a carbon number of 16, an olefin compound having a carbon number of 17, and an olefin compound having a carbon number of 18 in a mole ratio of 5 / 3 / 2.

[0208] The resultant reaction product was saponified in an ammonium hydroxide aqueous solution, thereby an aqueous solution of a polymer was obtained. The solid content of the polymer was 20% by mass in the aqueous solution.

synthesis example 3

—Synthesis of Olefin-Maleic Anhydride Copolymer—

[0209] A mixture of liner α-olefin compounds having a carbon number of 14 to 16 and maleic anhydride were poured into an autoclave in a mole ratio of 1 / 1, and the atmosphere within the autoclave was replaced with nitrogen gas, then the mixed compounds were allowed to react at 200° C. for 5 hours. The mixture of liner α-olefin compounds was comprised of an olefin compound having a carbon number of 14, an olefin compound having a carbon number of 15, and an olefin compound having a carbon number of 16 in a mole ratio of 3 / 5 / 2.

[0210] The resultant reaction product was saponified in an ammonium hydroxide aqueous solution, thereby an aqueous solution of a polymer was obtained. The solid content of the polymer was 20% by mass in the aqueous solution.

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Abstract

Disclosed is an electrophotographic recording medium that contains a support and an olefin-maleic anhydride copolymer, wherein the olefin-maleic anhydride copolymer exists at least near the surface of the electrophotographic recording medium on which an image is recorded, and the electrophotographic recording medium is reusable; and a method for producing an electrophotographic recording medium, an image forming method, a method for repeatedly using an electrophotographic recording medium, and a method for repeatedly using an electrophotographic recording medium.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to reusable electrophotographic recording media in which image forming materials can be removed or erased away from electrophotographic recording media, on which images being recorded, thereby the electrophotographic recording media can be regenerated and reused for recording images; methods for producing the electrophotographic recording media; image forming methods that utilize the electrophotographic recording media; and methods for repeatedly using the electrophotographic recording media by repeating the forming and erasing of images. [0003] 2. Description of the Related Art [0004] Recently, printers, analog copiers, and digital copiers on the base of electrophotographic system have widely spread and paper has been consumed concurrently in larger quantity. Paper utilized for the recording media is usually made from pulp derived from wood, thus volume consumption of paper leads to de...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G03G15/14G03G13/01G03G13/14G03G13/20B32B27/30C08J7/04
CPCB41M5/5218B41M5/5236Y10T428/273B41M7/0009G03G21/00B41M5/5254Y10T428/31935
Inventor MURAKAMI, KAKUJI
Owner RICOH KK
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